Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/80053
Title: Simulation of flows through submerged vegetation patches using macroscopic turbulence models
Authors: Chen Z 
Li, CW 
Zhan, J
Keywords: OpenFOAM
Turbulence model
Vegetation patch
Issue Date: 2015
Publisher: Elsevier
Source: Procedia engineering, 2015, v. 126, p. 315-320 How to cite?
Journal: Procedia engineering 
Abstract: Macroscopic approach incorporating the spatial averaging procedure is commonly used to investigate turbulent flows in porous media, terrestrial and aquatic canopies. In this work the hydrodynamics of flows through a semi-rigid vegetation patch (VP) was investigated with two macroscopic turbulence models. We modified the Reynolods Averaged Navier Stokes (RANS) equations to obtain the Volume Averaged (VARANS) equations and performed simulations using the open source code OpenFOAM. The numerical results of gradually varied flows over submerged VPs are compared with the corresponding experimental measurements. The results show that the macroscopic turbulence models simulate the velocity profiles with acceptable accuracy. The increase of vegetation density generates higher Reynolds stress around the top of vegetation and smaller velocity inside the VP. The two models perform differently in the computation of Reynolds stress, with the profiles from the model of Uittenbogaard (2003) requiring a shorter distance to reach the uniform state for the case of low vegetation density. Further works will be carried out to identify the cause of difference and to achieve a refined macroscopic turbulence model.
Description: 7th International Conference on Fluid Mechanics, ICFM 2015, 24-27 May 2015
URI: http://hdl.handle.net/10397/80053
EISSN: 1877-7058
DOI: 10.1016/j.proeng.2015.11.194
Rights: © 2015 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Peer-review under responsibility of the Chinese Society of Theoretical and Applied Mechanics (CSTAM)
The following publication Chen, Z., Li, C. W. & Zhan, J. (2015). Simulation of flows through submerged vegetation patches using macroscopic turbulence models. Procedia engineering, 2015, 126, 315-320 is available at https://dx.doi.org/10.1016/j.proeng.2015.11.194
Appears in Collections:Conference Paper

Files in This Item:
File Description SizeFormat 
Chen_Simulation_Flows_Submerged.pdf443.42 kBAdobe PDFView/Open
Access
View full-text via PolyU eLinks SFX Query
Show full item record
PIRA download icon_1.1View/Download Contents

Page view(s)

1
Citations as of Jan 14, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.